Animal-shears.



W. M. CAHILL.

ANIMAL SHEARS.

APPLIOATION FILED MAY 31, 1910.

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cO..\VASHlNu N D c WALTER M. CAHILL, OF WINONA, MINNESOTA.

ANIMAL-SHEARS.

Specification of Letters Patent,

Patented Feb.l 25, 1913.

Application filed May 31, 1910. Serial No. 564,077.

To all whomfe'zt may concern.'

Be it known that I, IALTER M. CAI-ULL, a citizen of the United States,residing at iVinona. in the county of 'Winona and State of 5 Minnesota,have invented a certain new and useful Improvement in Animal-Shears, ofwhich the following is a specification.

My invention relates to improvements in animal shears and has for itsobject to pro- 0 vide an improved bearing for such shears.

It. is illustrated in the accompanying drawings, wherein- Figure l is aplan view of the device; Fig. Q, a ction along the line 2-2 of Fig. l;Fig. 3, a section along the line 3-3 of Fig. 2 on a large scale; Fig. 4,a longitudinal section through the rocker arm; Fig. 5, a detail of oneof the spacing members.

Like letters refer to like parts throughoutv the several drawings.

The shell A is integral with and mounted upon the cylindrical handle A1and carries the hub A2 which has the forwardly extending flange A37 thecomb-plate A5 having the teeth AG. The cover B having` the collar B1.within which is screw threaded thereto the plug B2, is held upon theshell A by the screws B3 and the collar B'L which is screw threaded uponthe handle A1 and has the conical surface B5 to engage the correspondingconical surface B6 upon the cover B and the shell A. The drive shaft Cis carried in the bearing C1 within the handle A1 and has at its end thecrank disk C2 carrying the 5 crank C3 upon which is rotatably mountedthe ball Ct. The rocker arm G5 which is mounted upon the shaft G6 has atone end the cylindrical part C7 partially inclosing the ball C* and atthe other has the downwardly extending ball bearing C2 and intermediateit and the shaft C6, the downwardly extending lug C9 perforated at C1".The yoke D having the bosses D1 and lingers D2 in contact respectivelywith the cutter plate D3 and outer cutting blades thereof D4 isperforated at D5 to permit the passage of the ball CS and has therearwardly extendingcylindrical lug D6 within the perforation G10 in thelug C2 and has the downwardly extending hanger D7 which is perforatedatI DS. The yoke E having the iingers E1 in contact with the innercutting teeth of the plate D3 is provided with the socket bearing E2 toengage the ball GS and 5 has the rearwardly projecting part E3 restingupon the hanger D7 and carrying the pin E4 which engages the perforationD8 in the hanger DT. The shaft C is mounted at either end withinbearings in the hub A2 and plug B2 respectively. The description of onewill suffice for both. The cylindrical collar F perforated at F2surrounds the end of the shaft and is mounted within the roller cage F2within the body of the hub. The annular washers Ft F5 which surround theshaft CG have the concaved surfaces F to inclose the packing F7, thepressure upon which may be adjusted by means of the screw FS to providean oil-tight dust-proof chamber or casing for the bearings. Theperforated shaft CG which is hollow and has one end closed by thediaphragm G perforated at Gl contains the balls G2 separated by thespacing members G3 and provides an oil-tight dust-proof connection orpassage between the bearing or chamber. The upper ball within the shaftprojects above the end of it and is in contact with the web G4 whichforms the bottom of the oil cup G5 and is perforated at GG. The cap GTis rigidly attached to the plug B2 and has the corrugations GSthereabout which are engaged by the projection G9 upon the spring G20 tohold the plug B2 in position.

It will be evident that while I have shown in my drawings an operativedevice, still numerous changes might be made in the size, shape andarrangement of parts without departing materially from the spirit of myinvention.

The use and operation of my invention are as follows: I provide animalshears driven by a rotating shaft having a rocker arm to oscillatecutting knives in opposit-ion to stationary cutting knives, said rockerarm being mounted upon a rock shaft. I provide a bearing for said rockshaft comprising a cylindrical collar within which said rock shaftis-rotatably mounted, a. roller bearing about said collar and packingmeans about'said shaft to prevent the ingress of dust into the bearings.I provide a ball bearing in the end of the shaft in order that pressuremay be brought through the shaft and the rocker arm upon the cuttingteeth without undue friction. I provide a hollow rock shaft and an oilcup at one end of said shaft with passage through said shaftfrom the oilcup to each of the bearings. By this means, I am enabled to have acontinuous oil chamber connecting the two bearings, preventing theadmission of dust or dirt and preventing the loss of the lubricant.

I Claim :h

l. In an animal shears, a hollow rook shaft, a perforated plug in oneend of said shaft, a plurality of balls Within Said shaft, one of saidballs extending beyond the end of the shaft. Y

2. In an animal shears, a rocker arm, rook shaft upon which said arin ismounted, antiy friction bearings at either end of said shaft and an oilpassage between said bearings7 anti-friction bearings upon eaeh end ofSuch bearings, said bearings comprising a Cylindrical collar and aroller Cage.

3. In an animal shears, a rocker arm, rook shaft upon which said arm ismounted, antifriction bearings at either end of said Shaft l and an oilpassage between said bearings,l anti-friction bearings upon each end ofSuch l bearings, said bearings comprising a oylinl drioal collar and aroller Cage.

4l. In an animal shears, a rocker arm and roch shaft upon which said armis mounted, anti-frietion bearings at either end of Said shaftcomprising a cylinder having perl forated Walls and inelosing the shaftand a roller cage about said eylindeiga connection through said Shaftbetween said bearings and a ball. in one end of said Shaft in engagementwith a flat surface at the end of one of Said bearings.

5. In an animal shears, a rocker arm and reel; shaft upon which said armis mounted, anti-friction bearings at either end of said shaftcomprising a cylinder having perforated Walls and inelosing' the shaftand a roller Cage about said cylinder, a Connection through said shaftbetween said bearings and a ball in one end of said shaft in engagementwith a i'at surface at the end ot' one ot' said bearings, and aplurality of eon- Cave Washers about said shaft in engagement with saidbearings.y means for holding said Washers in juXta-positions one to theother l to :torni a packingl containing cavity about the shaft.

WYALTER M. CAHILL. l'litnesses Finnois W. PARKER, Jr., PAUL J. GATHMANN.

Copies of this patent may be obtained foi` ve cents each, by addressingthe Commissioner of Patents, Washington, B. C.

